package com.java.system.common.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @ClassName: ApplactionContextUtil
 * @Description:
 * @Version: v1.0.0
 * @Author: greatesky
 * @Date: 2019/6/6 15:05
 * Modification History:
 * Date             Author      Version     Description
 * -------------------------------------------------------------
 * 2019/6/6      greatesky      v1.0.0      创建
 */
@Component
public class ApplactionContextUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
    private static final Logger logger = LoggerFactory.getLogger(ApplactionContextUtil.class);
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if(ApplactionContextUtil.applicationContext == null) {
            ApplactionContextUtil.applicationContext = applicationContext;
        }
        logger.info("ApplicationContext配置成功,ApplactionContextUtil.getAppContext()获取applicationContext对象");
    }

    /**
     * 获取applicationContext
     * @return
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过name获取 Bean.
     * @param name
     * @return
     */
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过class获取Bean.
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     * @param name
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(String name,Class<T> clazz){
        return getApplicationContext().getBean(name, clazz);
    }
}
